Here are two links from the manuals:
How can I reinstall Piwik? Can I keep the existing data?
How can I move Piwik from one server to another, also migrating the data from one mysql server to another?
I suspect that this should be enough unless you need help with MySQL:
How To Migrate a MySQL Database Between Two Servers
You can ignore the copy method ...
If you know some Python (or are not afraid to learn) you should approach this with pywikibot.
You can loop through wiki.allpages() and you can add some logic to decide whether to delete a page or not. Good criteria:
Does the page contain specific words? E.g. related to drugs or porn.
Does the page have wikilinks to other pages?
Does the page have links ...
Here is several free relational database service.
"To help new AWS customers get started in the cloud, AWS is introducing a free usage tier. The free tier can be used for anything you want to run in the cloud: launch new applications, test existing applications in the cloud, or simply gain hands-on experience with AWS.
Quoting my answer from StackOverflow:
It should now be possible to host ASP.NET applications on App Engine. Use the custom runtime feature on App Engine and Microsoft's ASP.NET Docker image with your application. Also, you need to create a route for /_ah/health and respond with HTTP status code 200 and a blank message body (see lifecycle events).
The simplest way to migrate the data between two hosts would be with phpmyadmin.
On your old site login to phpmyadmin select the database on the left menu.
On the Export tab leave all the settings as they are and download the .sql file
Login to the new website through phpmyadmin (assuming you've created a db/user) click the database on the left menu and ...
When using MySql, I always recommend using https://www.mysql.com/products/workbench/. However, you do need to have some ports opened on your firewall, assuming you have one, and make sure your MySql is properly secured which can be found here: https://dev.mysql.com/doc/refman/5.7/en/security.html. If you do not have a firewall, then the process becomes that ...
How To Change Wordpress index.php Name
This should answer your last question. I think this would let you run Wordpress and Joomla out of the same directory, but you have to keep in mind that they will likely be sharing an htaccess file which can get messy and also if you are using permalinks things might be even trickier.
Open .htaccess file of the root ...